help=_("run entirely from system cache, don't update cache"))
group.add_option("-c", "--config", dest="conffile",
- default='/etc/yum/yum.conf',
-+ default='None',
++ default=None,
help=_("config file location"), metavar='[config file]')
group.add_option("-R", "--randomwait", dest="sleeptime", type='int',
default=None,